缎

Left-side silk radical, the simplified three-stroke form of 糸 (a twist of silken threads). The indexing radical — 缎 is satin, a tightly woven lustrous silk. Same fabric/thread family: 绸 silk fabric, 绒 velvet, 绣 embroidery, 绳 rope, 织 to weave. Recognising 纟 immediately flags any character as textile-related.

Right side 段 supplies the sound exactly: duàn → duàn, identical pinyin and tone. 段 originally pictured a hand wielding a hammer on stone — to forge, cut into pieces — surviving in 'segment / paragraph.' The 'measured length' nuance carries into 缎: bolts of satin cut into trade-sized sections. Same phonetic: 锻 to forge, 椴 linden.